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Development of Three Way Catalyst Aging Model: Application to Real Driving Emission Condition
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 9, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Further reduction of vehicles pollutant and CO2 emissions is required to prevent global warming and to improve air quality. The exhaust system is designed to ensure low emission during all life of the vehicle. As catalyst aging is affecting the catalyst performance, such impact needs to be consider upfront during the design of the fresh catalyst. Until now, the exhaust system design are evaluated based on real tests for each vehicle, using exhaust lines aged on engine test benches or burner benches. This induces major investigation limitations such as: late evaluation in development cycle, high testing and prototyping cost. The usage of Model Based Development approach can be a powerful way to improve this process by allowing system evaluation under several aging conditions at early development stage. The present study focuses on modelling of the Three Way Catalyst (TWC) aging to predict the mileage impact on tailpipe emissions. The activity was divided in 4 steps: 1- Development of a detailed TWC for 4 different aging levels. The impact of aging is considered by tuning the pre-exponential factors of the reactions Arrhenius laws. The activation energies are not modified, since they are representative of the active site type. 2- Aging model development: aging laws are extracted from previous calibrated model considering reaction groups (oxidation, NO reduction, Oxygen Storage Capacity (OSC)…) and Platinum Group Metal (PGM) type. 3- Model validation on driving cycle: The tailpipe emissions are predicted with less than 15% deviation on WLTC. 4- Application and validation to another TWC technology (different amount of PGM and OSC): in that case also, the aged TWC emissions prediction is within 15% deviation on WLTC. The proposed aging model provides the possibility to predict aging of any TWC using same washcoat family, based on existing TWC model calibrated in fresh condition.
CitationLe Louvetel-Poilly, J., Balaji, S., and Lafossas, F., "Development of Three Way Catalyst Aging Model: Application to Real Driving Emission Condition," SAE Technical Paper 2019-24-0047, 2019.
Data Sets - Support Documents
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- Lambrou, P. S., Costa, C. N., Christou, S. Y., and Efstathiou, A. M. , “Dynamics of Oxygen Storage and Release on Commercial Aged Pd-Rh Three-Way Catalysts and Their Characterization by Transient Experiments,” Applied Catalysis B: Environmental 54:237-250, 2004.
- Winkler, A., Dimopoulos, P., Hauert, R., Bach, C., and Aguirre, M. , “Catalytic Activity and Aging Phenomnea of Three-Way Catalysts in a Compressed Natural Gas/Gasoline Powered Passenger Car,” Applied Catalysis B: Environmental 84:162-169, 2008.
- Koltsakis, G. and Stamatelos, A. , “Catalytic Automotive Exhaust Aftertreatement,” Prog. Energy Combust. SCi. 23:1-39, 1997.
- Matam, S. K., Otal, E. H., Aguirre, M. H., Winkler, A. et al. , “Thermal and Chemical Aging of Model Three-Way Catalyst Pd/Al2O3 and Its Impact on the Conversion of CNG Vehicle Exhaust,” Catalysis Today 184:237-244, 2012.
- Koltsakis, G. C., Konstantinidis, P. A., and Stamatelos, A. M. , “Development and Application Range of Mathematical Models for 3-Way Catalysts Converters,” Applied Catalysis B: Environmental 12:161-191, 1997.
- Koltsakis, G. C. and Stamatelos, A. M. , “Modeling Dynamic Phenomena in 3-Way Catalytic Converters,” Chemical Engineering Science 54:4567-4578, 1999.
- Pontikakis G., Stamatelos A. , “Mathematical Modelling of Catalytic Exhaust Systems for Euro-3 and Euro-4 Emissions Standards,” Proc. Instn Mech. Engrs 215 Part D, 2001
- Tischer, S., Jiang, Y., Hughes, K., Patil, M. et al. , “Three-Way-Catalyst Modeling - A Comparison of 1D and 2D Simulations,” SAE Technical Paper 2007-01-1071, 2007, doi:10.4271/2007-01-1071.
- Granger, P., Lecomte, J. J., Leclercq, L., and Leclercq, G. , “An Attempt at Modelling the Activity of Pt-Rh/Al2O3 Three Way Catalysts in the CO+NO Reactions,” Applied Catalysis A: General 208:369-379, 2001.
- Gong, J., Wang, D., Li, J., Kamasamudram, K. et al. , “An Experimental and Kinetic Modeling Study of Aging Impact on Surface and Subsurface Oxygen Storage in Three Way Catalysts,” Catalysis Today 302:51-60, 2019.
- Baik, J. H., Kwon, H. J., Kwon, Y. T., Nam, I.-S. et al. , “Effect of Catalyst Aging on the Activity and Selectivity of Commercial Three-Way Catalysts,” Topics in Catalysis 42-43, 2007.
- Tsinoglou, D. N., Koltsakis, G. C., and Peyton Jones, J. C. , “Oxygen Storage Modeling in Three-Way Catalytic Converters,” Ind. Eng. Chem. Res. 41:1152-1165, 2002.
- Exothermia SA , “Axisuite 2017 software User Guide,” 2018, www.exothermia.com.
- Gong, J., Wang, D., Li, J., Kamasamudran, K. et al. , “Experimental and Kinetic Modeling of Degreened and Aged Three-Way Catalysts: Aging Impact on Oxygen Storage Capacity and Catalyst Performance,” SAE Technical Paper 2018-01-0950, 2008, doi:10.4271/2018-01-0950.
- Wang, D., An, H., Gong, J., Li, J. et al. , “Diagnostics of Field-Aged Three-Way Catalyst (TWC) on Stoichiometric Natural Gas Engines,” SAE Technical Paper 2019-01-0998, 2019, doi:10.4271/2019-01-0998.
- Kang, S. B., Han, S. J., Nam, S. B., Nam, I.-S. et al. , “Activity Function Describing the Effect of Pd Loading on the Catalytic Performance of Modern Commercial TWC,” Chemical Engineering Journal 207-20, 2012.
- Sabatini, S., Gelmini, S., Hoffman, M. A., and Onori, S. , “Design and Experimental Validation of a Physics-Based Oxygen Storage - Thermal Model for Three Way Catalyst Including Aging,” Control engineering Practice 68, 2017.